Beat-up mechanism of looms for weaving



May 23, 1939. o. SHIMWELL ET AL BEAT-UP MECHANISM OF LOOMS FOR WEAVING Filed Aug. 29, 1938 6 sheets -sheet 2 D. M J6 fm we? I? ravirs M y 1939- o. SHIMWELL ET AL 2,159,865

BEAT-U}; MECHANISM OF Lbowis FOR WEAVING Filed Aug. 29, 1938 e Sheets-Sheet s 214,5755; Jz'm n e// 2. W fizmwe May 23, 1939- o. SHIMWELL ET AL BEAT-UP MECHANISM OF LOOMS FOR WEAVING Filed Aug. 29, 1938 6 Sheets-Sheet 4 y 9 o. SHIMWELL ET AL 2,159,865

BEAT-UP MECHANISM OF LOOMS FOR WEAVING Filed Aug. 29, 1938 6 Sheets-Sheet 6 Patented May 23, 1939 PATENT OFFICE BEAT-UP MECHANISM OF LOOMS FOR WEAVING Oliver Shimwell and Derrick Walter Shimwcll, Styles, Shiplake on Thames, England Application August 29,

1938, Serial No. 227,400

In Great Britain October 5, 1937 22 Claims.

This invention relates to looms for weaving and has for its object to provide improved beating up mechanism which shall allow of an increased part of the loom cycle being given to the flight of the shuttle so that whilst the loom cycle can be speeded up, the speed of the shuttle need not be increased.

The invention comprises the mounting and operation of the reed and slay separately from the shuttle boxes, the reed, slay and shuttle boxes moving together towards the beat up position during the time that the shuttle is travelling through the reed space after which the shuttle boxes slow down whilst the reed and slay move forward at an increased speed to effect beating up when the slay returns and overtakes the shuttle boxes with which it moves in line backwards to the initial position during the flight of the shuttle through the reed space.

The invention further comprises the provision of means whichii the shuttle does not enter a shuttle box prior to the beating up operation, prevent the reed and slay moving forward to effect beating up. The loom is also stopped by a knock-off mechanism.

The invention further comprises the improved means hereinafter described for actuating the reed and slay, the shuttle boxes, and the safety device to prevent beating up if the shuttle is not in its box, and a means of gently bringing the loom to a standstill.

Referring to the accompanying explanatory drawings:

Figure l is a general view of shuttle box and reed and slay operating mechanism arranged in one convenient form in accordance with this invention, the reed being shown in the beat up position. I Figure 2 shows the mechanism of Figure 1 when the beat up is stopped due to the failure of the shuttle to enter a shuttle box.

Figure 3 shows the mechanism of Figure 1 which operates the reed and slay.

Figure 4 shows the mechanism of Figure 1 which operates each shuttle box.

Figure 5 is a View similar to Figure 2 but showing a modified arrangement of operating mechanism.

Figure 6 is a view similar to Figure 3 and Figure 7 a view similar to Figure 4 but showing the modified mechanism of Figure 5.

Figure 8 is a view similar to Figure 2 but showing a further modified arrangement of mechamsm.

Figure 9 shows the Figure 8 arrangement with the parts in the beat up position. 1

In Figures 1-4, 11. indicates a shuttle box. This is carried by. two arms or swords b, 0 having their pivotal points at d and e respectively. The arm 0 is operatively connected by the link 7 with an eccentric g'which serves to move the shuttle box back and forth through a constant distance. The two arms I), c differ in length, the forward arm b being shorter than the rear arm c. This is an important point because it ensures that the path of the base of the shuttle boxes, upon which the shuttle rests when it is in the box, keeps in line with the lower row h of warp threads so that the shuttle can be passed into the warp shed when the shuttle boxes are very close to the forward end of their stroke and be received by the box at the other side of the loom when the shuttle boxes have receded from their forward position.

Upon both of the shuttle boxes is an arm 2' which is held in the lower position shown in Figure 4 when there is a shuttle in the shuttle box butis raised by spring pressure to the upper position shown in Figure 2 when the shuttle is absent from the shuttle box. The function of the arm 2 will be described later. It will be understood that there is a shuttle box at each side of the loom, both similarly mounted and operated.

The slay a and reed k constitute a single operative unit, separate from the shuttle boxes, mounted upon the two pairs of arms or swords m, n pivoted about the same axes d, e as the arms I), c and of similar length to said arms so that the slay has the same path of movement as the shuttle boxes. The fulcrum point of connection 0 of the arm n to the slay also forms the point of connection of two interconnected links p, q, the latter of which is connected to a lever 1 upon which is a bowl s which runs in the cam groove or track t in the revolving member 11.. Connected to the arm n is a catch lever 0 adapted to be engaged by the arm 2' previously referred to and such catch lever is connected to the link q and lever 1' by the three interconnected links w, a: and y. A plate 2 secured upon the link 10 which extends over the link q, prevents such links moving to a position to bring their interconnecting pivot point p below a line joining their pivot points 0, p and q The cam track it is so designed that it gives a relatively'slow rate of movement to the slay and reed whilst the latter move with the shuttle boxes, but when the shuttle boxes complete their forward movement, the cam track t gives a rapid 55 rate of movement to the slay and reed to eflect beating up and to return the slay and reed to a position in which they line up and again move with the shuttle boxes.

Figure 1 shows the slay and reed advanced to the beat up position and it will be noted that the links 10-; and q are in line and are acting as a strut totransmit the movement ofthe lever r to the arm n and so to the slay and reed.

There is a part a termed the swell upon each shuttle box, which is pressed outwards to the position shown in Figure 1 when the shuttle is in the box, and which occupies the position shown in Figure 2 when. there is no shuttle in the box. Such part a? bears against an adjustable projection a on the lever 01. which is upon a spindle having the catch lever i secured thereon.

If from any cause the shuttle should become trapped in the warp shed and does not enter the shuttle box, then the arm 2' will be in the position shown in Figure 2 and will be engaged by the catch lever V as the cam track t moves the lever 1 forward to give a forward movement to the slay and reed. The lever V will, during such forward movement, be turned about its fulcrum point V upon the arm n and will push the links w, :c, y, p and q to the positions shown in Figure 2 with the result that the movement of thelever 1', which normally gives the beating up movement to the slay and reed, merely moves the links 10 and q out of line whilstthe arm 71 remains stationary. Thus no heat up is effected and damage to the warp threads by the trapped shuttle is obviated. For convenience of reference, the action of the arm 2' and catch lever V may be said to break the toggle linkconnection p, q between the lever r and arm n by which the slay and reed are moved to effect beating up.

Secured to the spindle 0/ having the arm 2' thereon, is an arm 50 facing in the opposite direction to the arm 2 and when the shuttle upon entering the shuttle box presses back the swell a against lever (1 the lever a lifts arm 50 over the part 5|, termed the frog, at the same time that it depresses the arm 2' out of catch 0, and so the loom continues to work. When the arm'z' is not depressed by lever a that is when the shuttle has not entered the shuttle box, arm 50 engages frog 5i and presses it forward against the'action of a spring 52. The frog 5! is attached to a connecting rod 53 which pulls a brake 54 on to the brake wheel 55, and at the same time the front end of the connecting rod is pushed forward against the starting handle 56, which is pushed out of the usual catch 51 and then knocks off or stops the loom. The frog 5I in its forward movement does not come up against any fixed stop and allows the loom to run over front centre, so that in stopping the loom there is no sudden jar and the loom pulls up gently against the action of the spring 52 on frog 5| and the brake 54. I

The reed, slay and shuttle boxes move together towards the beat up position during the time that the. shuttle is travelling through the reed space. As soon as the shuttle leaves the reed space and is boxed, the shuttle boxes slow down,

whilst the reed and slay move forward at an increased speed to effect beating up. The slay and shuttle boxes come to rest at the same time but the reed is then positioned well in advance of the line of the shuttle boxes. The slay andshuttle boxes commence to move backwards simultaneously but as the slay travels much faster than theshuttle boxes, it soon comes int'o'line therewith, when the shuttle can enter the reed space for another pick. The slay and shuttle boxes now move backwards in line with one another.

It will be noted that the shuttle boxes only travel about one half the distance travelled by the shuttle boxes of an ordinary loom and therefore need travel at only one half the normal shuttle box speed. The slay and reed travel with the shuttle boxes until the shuttle has been boxed and then are accelerated quickly and complete the journey to effect beating up and return to a position in line with the shuttle boxes at a relatively rapid speed. This speeding up of the actual beating up operation allows the speed of the shuttle to be still further reduced and so enables us to devote a greater part of the loom cycle to the picking operation, with the result that the loom cycle can be speeded up without speeding up or even with a slowing down of the shuttles. Thus of the 360 degrees of the loom cycle, 240 degrees may be occupied by the shuttle travel cycle. As the slay and shuttle boxes have a movement in an arc of a circle which corresponds substantially with the line of the bottom row of warp threads in the shed, the shuttle can enter the shed very early, and leave the shed and enter the shuttle boxes very late in the loom cycle; thus giving the shuttle a long time to travel from side to side.

As the weight of the slay and reed is very much less than the usual slay, reed and shuttle boxes, the increased beating up speed does not involve a corresponding increase in power consumed and wear of the beat up mechanism.

The modification shown in Figures 5, 6 and 7 differs from the arrangement shown in Figures 1-4 chiefly in respect of the means for preventing beat up when the shuttle is trapped in the shed and does not enter the shuttle box. In this case the arm 2 which had thereon the bowl 3 running in the cam track 4 is pivotally connected to a lever 5 which is pivoted at 6 to the rear arm or sword I carrying the slay 8 and reed 9. The arm Iii-which is moved by mechanism actuated by the shuttle swell is mounted upon the upper end of lever 5 and the lower end of the latter is pivotally connected to the toggle links II, I2, the link I2 being pivoted about a fixed fulcrum I3. A stop 30 limits the upward movement of the link I2. A spring 3I tends to draw the link I2 always to and maintain it' against the stop. A link I4 pivoted to the fulcrum pin by which the links II and I2 are interconnected is secured to a link I5 attached to the catch lever I6 pivoted at I'i and to a link I8 pivoted about a fixed fulcrum point I8. When due to the shuttle becoming trapped in the Warp shed, the arm I0 remains lowered, it engages the upper end of the catch leverv and when the lever 5 is moved by the rod 2 and cam track 4, the lever I5 is turned about its fulcrum I1 and draws the link I5 to the left so pulling the links I4 and I8 more into line, which results in the toggle links I I and I2 being moved out of line as shown in Figure 5. The lever 5 therefore imparts no forward movement to the arm or sword I and the slay and reed after the arm H] has commenced to move the catch lever I6. This arrangement is similar to that previously described in utilising toggle links which are moved out of line to prevent the slay and reed being moved to the beat up position when the shuttle is trapped in the shed.

The arrangements for stopping the loom when the shuttle does not enter the shuttle box are similar to those described with reference to Figures 1-4.

The shuttle boxes a are movedby a cam track 20 (see Figure '7), rod 2|, and arms or swords 22, 23, which are similar to what is described in Figures 1-4,

In the arrangement shown in Figures 8 and 9, there is a cam groove 24 in a member 25 pivoted about a fixed point 26, and oscillated by the crank 2'! and rod 28, the said member 25 being connected by a link 29 with the rear arm or sword 33 which carries the shuttle box at both sides of the loom. There is a similar arrangement at each side of the loom.

There is a connecting rod 34 with a bowl 35 thereon at one end which enters the cam groove 24, the other end of the rod being pivoted to the rear arm or sword 36 carrying the slay 31 and reed 38. At an intermediate point, the rod 34 is connected by the toggle links 39 and 40 with a fulcrum point 4| upon the cam or sword 36. A catch 42 pivotally mounted upon the link 40 is raised when the shuttle is in the shuttle box .and lowered by spring or other means when the shuttle is not in its box. When lowered, the end of the catch 42 engages a frog 43 which when the arm or sword 36 is being moved forwards by the cam groove 24 and rod 34, turns the lever 40 about its fulcrum 4| and causes the bowl 35 on the rod 34 in the track 24 to be lowered in the latter, so that no further forward movement is imparted to the arm or sword 36 and the slay and reed. No beat up therefore occurs. The positions of the parts when beat up is effected are shown in Figure 9 and when beat up is not effected are shown in Figure 8.

The arrangements for stopping the loom are similar in this form of our invention to what are described in Figures 1-4.

In all forms of the invention both the shuttle boxes and the reed and slay are carried by pairs of arms or swords designed to give to the shuttle boxes and slay and reed movements which keep the shuttle track from box to box just below the line of the lower warp threads of the shed, so that the shuttle can enter the shed very early and leave the shed and enter the shuttle boxes very late in the forward and rearward movement of the shuttle boxes. The arrangement also allows the slay to move well below the cloth at beat up, so giving more room for the loom temples. Also in all the forms of the invention, the trip mechanism for preventing beating up comprises toggle links which are moved out of line when the shuttle has become trapped in the shed and has not entered the shuttle box. The trip mechanism is operatively connected with a knock-01f mechanism.

The knock-off mechanism is similar to the usual knock-01f mechanism of a fast reed loom, but owing to the safety device as already described, in which the beat-up does not occur when the shuttle fails to enter the box, the loom can be brought to a standstill gently as the frogs as (Figures 1 and 2) do not come up against a stop, but allow the loom to run over the beat up point. Thus the loom can be brought to a standstill with a gentle movement although travelling far faster than is possible when using the usual knock-01f mechanism of an ordinary'loom.

It will be appreciated that the full stroke of the shuttle boxes may be from one half to two thirds of the full stroke of the reed and slay. Due to the speeding up of the reed and slay for the beating up operation, up to 250 to 270 degrees of the loom cycle may be taken by the passage of the shuttle through the shed formed by the warp threads when a positive pick is employed and up to 200 to 240 degrees when a negative pick is employed. The length of the stroke of the reed and slay is that of an ordinary loom whilst that of the boxes is much less, which involves a considerable reduction in the lead on the loom.

The boxes move forwards and backwards with a continuous motion, but as they are only travelling about half the distance of the travel of an ordinaryloom, the dwell on front centre is about twice as long as that of an ordinary loom. This is most important when this loom is used as an automatic loom as it gives twice the amount of time of the loom cycle for the operating mechanism of the automatic change cop or change shuttle to make the change.

We claim:

1. Beat up mechanism for a loom comprising a slay, a reed upon said slay, shuttle boxes separate from said slay at opposite ends thereof, swords carrying said shuttle boxes, means to move said shuttle boxes backwards and forwards and means to move said slay forwards in unison with said shuttle boxes, further forward at an increased rate of speed to the beat-up position, rearward at a speed greater than the rate of rearward movement of said shuttle-boxes until said slay is in line with said shuttle boxes and thereafter rearward in unison therewith.

2. Beat up mechanism for a loom comprising a slay, swords carrying said slay, a reed upon said slay, shuttle boxes separate from said slay at opposite ends thereof, swords carrying said shuttle boxes, means to impart a simple harmonic backwards and forwards movement to said shuttle boxes, a movable cam, a cam follower associated therewith, and a connection from said cam follower to said slay, the shape of said cam being such that said slay has first a forward movement corresponding to the forward movement of the said shuttle boxes,-thereafter a further forward movement at an increased speed beyond the furthest forward position of the latter, an initial rearward movement at a speed greater than that of the rearward movement of the shuttle boxes until the slay is in line therewith and thereafter a rearward movement of the slay in unison with the said shuttle boxes.

3. Beat up mechanism for a loom comprising a slay, swords carrying'said slay, a reed upon said slay, shuttle boxes separate from said slay at opposite ends thereof, swords carrying said shuttle boxes, a rotary excentric for each shuttle box, a connection from each said excentric to the shuttle-box associated therewith, a rotary cam track, a bowl riding in said cam track, and a connection from said bowl to said slay, the shape of said cam track being such that said slay has first a forward movement corresponding to the forward movement of the said shuttle boxes, thereafter a further forward movement at an increased speed beyond the furthest forward position of the latter, an initial rearward movement at a speed greater than that of the rearward movement of the shuttle boxes until the slay is in line therewith and thereafter a rearward movement of the slay in unison with the said shuttle boxes.

4. Beat up mechanism for a loom comprising a slay, swords carrying said slay, a reed upon said slay, shuttle boxes separate from said slay at opposite ends thereof, swords carrying said shuttle boxes, a rotary exoentric for each shuttle box, a connection from each said excentric to the shuttle box associated therewith, a member mounted for pivotal movement, means to reciprocate said member about its pivot, a cam track in said member, a bowl riding insaid cam track, and .a connection from said bowl to said slay, the shape ofsaid cam track being such that said slay has first a forward movement corresponding to the forward movement of the said shuttle boxes, thereafter a further forward movement at an increased speed beyond the furthest forward position of the latter, an initial rearward movement at a speed greater than that of the rearward. movement of the shuttle boxes until'the slay is in line therewith and thereafter a rearward movement of the slay in unison with the said shuttle boxes.

5. Beat up mechanism as claimed in claim 1, comprising also means to put out of action the means for moving the slay in the event of the shuttle failingto enter the shuttle box correctly.

6. Beat up mechanism as claimed in claim 2, comprising also means responsive to the presence of the shuttle in the shuttle box to break the connection from the cam follower to the slay in the event of the shuttle failing to enter the shuttle box correctly '7. Beat up mechanism as claimed in claim 3, comprising also means responsive to the presence of the shuttle in the shuttle box to break the connection from the bowl to the slay in the event of the shuttle failing to enter the shuttle box correctly.

8. Beat up mechanism as claimed in claim 4, comprising also means responsive to the presence of the shuttle in the shuttle box to break the connection from the bowl to the slay in the event of the shuttle failing to enter the shuttle box correctly.

9. Beat up mechanism as claimed'in claim 2, wherein the connection specified between the cam follower and the slaycomprises a strut consisting of a pair of links forming a toggle, together with, a swell upon each shuttle box and means actuated by said swell to collapse said toggle in the event of the shuttle failing to enter the shuttle box correctly.

10. Beat up mechanism as'claimed in claim 3, wherein the connection specified between the bowl and the slay comprises a strut consisting of a pair of links forming ,a toggle, together with a swell upon each shuttle box and means actuated by said swell to collapse said toggle in the event of the shuttle failing to enter the shuttle box correctly.

11. Beat up mechanism as claimed in claim 4, wherein the connection specified between the bowl and the slay comprises a strut consisting of a pair of links forming a toggle, together with a swell upon each shuttle box and means actuated by said swell to collapse said toggle in the event of the shuttle failing to enter the shuttle box correctly.

12. Beat up mechanism as claimed in claim 1, comprising also means to put out of action, the means for moving the slay in the event of the shuttle failing to enter the shuttle box correctly, a frog movably mounted upon the loom frame, a spring constraining said frog towards a rest position, an arm upon said shuttle box adapted to engage said frog and move it against the action of said spring, means to stop the loom actuated by movement of said frogand means to prevent said arm engaging said frog if the shuttle correctly enters the shuttle box.

.13. Beat up mechanism as claimed in claim 2, comprising also means responsive to the presence of the shuttle'in the shuttle box to break the connection from the cam follower to the slay in the event of the shuttle failing to enter the shuttle box correctly, a frog movably mounted upon theloom frame, a spring constraining said frog towards a rest position, an arm upon said shuttle box adapted to engage said frog and move it-against the action of said spring, means to sto-pthe loom actuated by movement ofsaid frog and means to prevent said arm engaging said frog if the shuttle correctly enters the shuttle box.

14; Beat up mechanism as claimed in claim 3, comprising also means responsive to the presence of the shuttle in the shuttle box to break the connection from the bowl to the slay in the event of the shuttle failing to enter the shuttle box correctly, a frog movably mounted upon the loom frame, a spring constraining said frog towards a rest position, an arm upon said shuttle box adapted to engage said frog and move it against the action of said spring, means to stop the loom actuated by movement of said frog and means to prevent said arm engaging said frog if the shuttle correctly enters the shuttle box.

15. Beat up mechanism as claimed in claim 4, comprising also means responsive to the presence of the shuttle in the shuttle box to break the connection from the bowl to the slay in the event of the shuttle failing to enter the shuttle box correctly, a frog movably mounted upon the loom frame, a spring constraining said frog towards a rest position, an arm upon said shuttle box adapted to engage said frog and move it against the action of said spring, means to stop the loom actuated by movement of said frog and means to prevent said arm engaging said frog if the shuttle correctly enters the shuttle box.

16. Beat upmechanism for a loom as claimed in claim l'comprising pairs of swords to carry such shuttle boxes and each end of the slay, the front 'sword of each pair being shorter than the rear sword and pivoted to the loom frame at a higher point, the lengths of the swords and the positions of the pivot points being such that the movement of the slay and shuttle boxes when in line with one another is substantially along a line parallel to and just below the lower layer of warp threads when the shed 'is'open, the slay coming well below the said line when in the actual beat up position.

17. Beat up mechanism for a loo-m as claimed in claim- 2 comprising pairs of swords to carry each shuttle box and each end of the slay, the front sword of each pair being shorter than the rear sword and pivoted to the loom frame at a higher point, the lengths of the swords and the positions of the pivot points being such that the movement of the slay and shuttle boxes when in line with one another is substantially along a line parallel to and just below the lower layer of warp threads when the shed is open, the slay coming W811 below the said line when in the actual beatup-position.

18. Beat up mechanism for a loom as claimed in claim3-comprising pairs of swords to carry warp threads when the shed is open, the slay coming well below the said line when in the actual beat up position.

19. Beat up mechanism for a loom as claimed in claim 4, comprising pairs of swords to carry each shuttle box and each end of the slay, the front sword of each pair being shorter than the rear sword and pivoted to the loom frame at a higher point, the lengths of the swords and the positions of the pivot points being such that the movement of the slay and shuttle boxes when in line with one another is substantially along a line parallel to and just below the lower layer of warp threads when the shed is open, the slay coming well below the said line when in the actual beat up position.

20. Beat up mechanism for a loom comprising a slay, a loom frame, swords pivoted to said frame carrying said slay, a reed upon said slay, shuttle boxes separate from said slay at opposite ends thereof, swords pivoted to said loom frame carrying said shuttle boxes, a rotary excentric, a strap around said excentric, a connection from said excentric to said shuttle box carrying swords, a rotary cam track, a bowl running in said cam track, a lever carrying said bowl intermediate its ends and pivoted to the loom frame at one end, a link pivoted to the other end of said lever, a further link pivoted to the other end of said link and to said slay carrying swords, the two said links together forming a toggle, an additional link pivoted at one end to said slay carrying swords and at its other end to one end of one of three further links all pivoted together at one end, the other ends of the other two further links being pivoted respectively to the link first above mentioned and to the lever whereto the latter is pivoted, a spindle upon said shuttle box, an arm secured to said spindle adapted toengage the additional link above mentioned, a further arm secured to said spindle, a frog movably mounted upon said loom frame, a spring constraining said frog towards a rest position, a starting handle for said loom, a part upon said frog adapted on movement thereof to engage said starting handle and stop said loom, a swell upon said shuttle box, a lever secured upon said spindle and actuated by said swell to turn said spindle and move said arms into positions in which they engage the said additional link and frog as the slay moves when the shuttle is not in the shuttle box, to collapse the said toggle and stop the loom, and to move the said arms into positions in which they fail to engage said additional link and arm when the shuttle is in the shuttle box, the said cam track being so shaped that said slay is given a forwards and backwards movement first forwards in unison with said shuttle boxes, then further forwards to the beat up position at an increased rate of speed, then backwards at a higher rate of speed than said shuttle boxes until it comes again into line therewith, and thereafter backwards in unison with said shuttle boxes until it reaches its initial position 21. Beat up mechanism for a loom comprising a slay, a loom frame, swords pivoted to said frame carrying said slay, a reed upon said slay, shuttle boxes separate from said slay at opposite ends thereof, swords pivoted to said loom frame carrying said shuttle boxes, a rotary member, an annular groove in said member excentrically centred with respect to said rotary member, a bowl running in said groove, a pitman carrying said bowl and pivoted to said shuttle box supporting swords, a spindle whereon said rotary member is mounted, a forked end upon said pitman embracing said spindle, a rotary cam track, a bowl running in said cam track, a lever carry ing said bowl intermediate its ends, a forked end upon said lever, a spindle carrying said rotary cam, the said forked lever end embracing said spindle, a further lever pivoted intermediate its ends to one of said slay swords, said first mentioned lever being pivoted to said further lever adjacent one end thereof, a link pivoted at one end to the other end of said further lever, a link pivoted to the other end of said first mentioned link and pivoted to a fixed point upon the loom frame at its own further end, the said two links together constituting a toggle, a spring acting to extend said toggle, a fixed stop so positioned as to restrain collapse of said toggle under the influence of said spring, an arm pivoted to the other end of said further lever, a catch lever pivoted at one end to said loom frame, and at its other end adapted to be engaged by said arm, a further toggle constituted by two links pivoted at their outer ends to said loom frame and to the common pivot of the two links of the first mentioned toggle, a further link pivoted at one end to the common pivot of the two links of the said further toggle and at its other end to said catch lever intermediate the ends thereof, a swell upon said shuttle box, a bell crank lever pivoted upon said shuttle box and adapted to be turned by said swell and to engage said catch lever engaging arm to prevent it engaging said catch lever when the shuttle is in the shuttle box, engagement of said arm with said catch lever when the shuttle is not in the shuttle box acting through said further link to straighten said second mentioned toggle and thereby collapse said first mentioned toggle and break the driving connection from the cam track to the slay swords, the said cam track being so shaped that said slay is given a forwards and backwards movement first forwards in unison with said shuttle boxes, then further forwards to the beat up position at an increased rate of speed, then backwards at a higher rate of speed than said shuttle boxes until it comes again into line therewith, and thereafter backwards in unison with said shuttle boxes until it reaches its initial position.

22. Beat up mechanism for a loom comprising a slay, a loom frame, swords pivoted to said frame carrying said slay, a reed upon said slay, shuttle boxes separate from said slay at opposite ends thereof, swords pivoted to said loom frame carrying said shuttle boxes, means to reciprocate said shuttle boxes backwards and forwards upon said swords, a rotary crank, a member pivoted to said loom frame, a connection from said member to said crank so that said member is reciprocated by said crank, a cam track formed in said pivoted member, a bowl running in said cam track, a connecting rod carrying said bowl at one end and at its other end pivoted to a link the other end of which is pivoted to said pivoted member, a link pivoted to said connecting rod intermediate its ends, a further link pivoted to the first mentioned link and to the said slay sword and together with said first mentioned link constituting a toggle, a bell crank lever pivoted to saidsecond mentioned link, a swell upon said shuttle box, means actuated by said swell when the shuttle is not in the shuttle box to press down said bell crank lever and turn same, thereby collapsing said toggle and breaking the driving connection from said crank to the said slay sword, a frog movably mounted upon said loom frame, a

10 backwards movement first forwards in unison with said shuttle boxes, then further forwards to the beat up position at an increased rate of speed, then backwards at a higher rate of speed than the movement backwards of said shuttle boxes until it comes again into line therewith, and thereafter backwards in unison with said shuttle boxes until it reaches its initial position.

OLIVER SHIMWELL. DERRICK WALTER SHIMWELL. 

